Enter your values and measure any clearances that you're worried about.

Rim & Tire Size Calculator. Custom Offsets

Tire Tech Information - The Wheel Fitment, Tyre Stretch, Rolling Radius and Speedometer Error Calculator. Play with specs, try different settings, compare results

www.wheel-size.com

 

I believe the offsets are measured in Millimeters. So the difference between your stock wheels and the Audi wheels is 3mm. That's 0.1181099 inch, or ~ 1/8". If you have that much or more of clearance when turning your stock setup full lock to lock, then it should be fine if you go with the correct size tires for those wheels.

 

I guess I don't know if I have that clearance but would think I do? I don't know how I'd be able to determine that though before buying the wheels? The link Turbo ABA provided seems to make me believe that it wouldn't touch the suspension but I'm truly a novice at this so I'm not confident in my determination

 

Please provide the exact specs of each wheel, and I will help you understand the calculator.
So we need information such as 19x8 et 57 and whatever size tire, going to 19x9 et 50 and whatever tire, etc.

 

This is the best tool out there for figuring it out. You can even include tire size to ensure you're keeping the same rotating diameter.

https://www.willtheyfit.com/

If the Audi wheels are the same width and you run the same tire, you should be ok. I know for sure in the rear front may be ok, but would recommend measuring and using the tool above.

 

If they are both 19x8.5 and the only difference is the offset from 59mm to 62mm, that is only a 3mm difference. So you will lose 3mm of space on the inner side of the wheel and the outer edge will tuck in 3mm more. Take a ruler and measure 3mm out on the inner most side of the wheel,which isn't much and see if it will hit anything.

 

As TurboABA pointed to - go to wheel-size.com and enter the values in to see.

But...to help more specifically with your question re the difference in offset, if you look on wheel-size.com on the "Alloy Wheel Fitment Page" and choose your vehicle, you will notice all of the different wheel / tire combinations that were standard fitment. Interestingly enough, and helpful for your question, on the "Tire Calculator page" if you enter the specs of your wheels and tires (19x8.5 / ET59 / 265/50/18) and use the optional factory 20" wheels for your model as the comparison (20x9 / ET57 / 275/40/20), in the results section - Suspension - you will see "Tire is 3 mm closer to suspension components. Rim is 4 mm closer to suspension components. Acceptable for most cars".

So there it is - the factory 20" wheel option is further inboard of what you're looking at (4mm for rim Vs 3mm for your Audi wheels) and all is good.

Hope that helps.

Oz